CN206758359U - Control relay circuit and power circuit - Google Patents
Control relay circuit and power circuit Download PDFInfo
- Publication number
- CN206758359U CN206758359U CN201720393146.6U CN201720393146U CN206758359U CN 206758359 U CN206758359 U CN 206758359U CN 201720393146 U CN201720393146 U CN 201720393146U CN 206758359 U CN206758359 U CN 206758359U
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- relay
- circuit
- electric capacity
- diode
- control
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Abstract
The utility model discloses a kind of control relay circuit, including relay driving module and relay power supply module；Relay driving module includes the control signal input that the switch element being connected in the current supply circuit of relay coil and controlling switch element are turned on and off；Relay power supply module includes being used for the power supply side, the first diode and the first electric capacity for connecting relay switch；The positive pole of first diode is connected with power supply side, and the negative pole of the first diode is connected with the first end of the first electric capacity, and the second end ground connection of the first electric capacity, the negative pole of the first diode is additionally operable to connect the input of relay coil.Accordingly, the invention also discloses a kind of power circuit.The utility model causes relay switch output voltage power down by providing independent power supply circuit for relay coil, to avoid the reduction of relay switch input terminal voltage from causing relay coil electricity shortage, so as to improve circuit stability and reliability.
Description
Technical field
It the utility model is related to electronic technology field, more particularly to control relay circuit and power circuit.
Background technology
Relay is a kind of electric control device, is when the change of input quantity reaches regulation requirement, makes in output circuit
A kind of electrical equipment of predetermined Spline smoothing occurs for controlled volume.It is applied to the control circuit of automation usually as " automatic switch "
In improve output response speed, such as：In the display driver circuit of liquid crystal display, between power supply and sequential control circuit
Cut-in relay carrys out the power supply of control sequential control circuit, shortens output voltage response time and rise time, improves response speed
Degree.
Relay includes coiler part and switch sections (i.e. contact part), more than to relay coil offer setting
Supply voltage (pick-up voltage) when, then can flow through certain electric current in coil, producing galvanomagnetic-effect makes relay switch adhesive
(i.e. relay movable contact and normally opened contact adhesive) is load supplying.The input of usual relay coil and relay switch
Input connects same power supply, relay coil electricity shortage can be caused when the power supply reduces suddenly, so as to cause relay
Switch off, output end power down, such as：When the input and output end of relay switch are respectively connected with electric capacity, and relay is defeated
During the capacity for the electric capacity that the capacity for going out the electric capacity of end connection is more than the connection of relay input, in relay switch adhesive, after
The electric capacity moment of electrical output terminal connection extracts electric charge, and relay input terminal voltage is quickly pulled low to the release less than relay
Voltage, relay coil electricity shortage is now caused, causing relay switch to disconnect, (i.e. relay movable contact breaks with normally opened contact
Open), the electric capacity of the input connection of relay switch recharges, and as electric capacity both end voltage rises, reaches relay adhesive
Relay switch adhesive again after voltage, so as to cause relay switch output end voltage to occur significantly falling ditch, disliked comparing
In the case of bad, output end voltage even can have 2-3 cheuch.
Utility model content
Technical problem to be solved in the utility model is, there is provided a kind of control relay circuit and power circuit, keeps away
Exempt from the reduction of relay switch input terminal voltage to cause relay coil electricity shortage and cause relay switch output end voltage to fall
Electricity, improve circuit stability and reliability.
In order to solve the above-mentioned technical problem, the utility model provides a kind of control relay circuit, including relay drives
Dynamic model block and relay power supply module；
The relay driving module includes the switch element being connected in the current supply circuit of relay coil and control institute
State the control signal input that switch element is turned on and off；
The relay power supply module includes being used for power supply side, the first diode and first for connecting relay switch
Electric capacity；
The positive pole of first diode is connected with the power supply side, the negative pole of first diode and described the
The first end connection of one electric capacity, the second end ground connection of first electric capacity, the negative pole of first diode be additionally operable to connection after
The input of electric apparatus coil.
Further, the relay driving module also includes the second diode with relay coil reverse parallel connection, its
In, the switch element is switching tube；
The control terminal of the switching tube is connected with the control signal input, described in the first end connection of the switching tube
The positive pole of second diode, the second end ground connection of the switching tube.
Further, the relay driving module also includes first resistor；
The first end of the switching tube is connected by the first resistor with the positive pole of second diode.
Further, the relay driving module also includes second resistance and 3rd resistor；
The control terminal of the switching tube is connected by the second resistance with the control signal input；The switching tube
Control terminal be also grounded by the 3rd resistor.
Further, the relay driving module also includes the second electric capacity；
The first end of second electric capacity is connected with the control terminal of the switching tube, the second termination of second electric capacity
Ground.
Further, the relay driving module also includes the 3rd diode and the 4th resistance；
3rd diode and second diode are in parallel in the same direction, and the 4th resistance and the first resistor are simultaneously
Connection.
Preferably, the switching tube is NPN type triode, the extremely described switching tube of current collection of the NPN type triode
First end, the second end of the extremely described switching tube of transmitting of the NPN type triode, the base stage of the NPN type triode is institute
State the control terminal of switching tube.
Correspondingly, the utility model additionally provides a kind of power circuit, including control relay circuit and relay；
The control relay circuit is foregoing control relay circuit；
The relay includes coil and switch；
The switch elements in series of the relay driving module is in the current supply circuit of the relay coil, the relay
The power supply side of device power supply module is connected with the relay switch, and the first diode of the relay power supply module is born
Pole is connected with the input of the relay coil.
Further, the power circuit also includes the 3rd electric capacity and the 4th electric capacity, wherein, the capacity of the 4th electric capacity
More than the capacity of the 3rd electric capacity；
The first end of 3rd electric capacity is connected with the input of the relay switch, the second end of the 3rd electric capacity
Ground connection, the first end of the 4th electric capacity are connected with the output end of the relay switch, the second termination of the 4th electric capacity
Ground.
Control relay circuit and power circuit provided by the utility model, power supply for relay switch while powering
Charged by the first diode for the first electric capacity, be relay after the first electric capacity both end voltage reaches the pick-up voltage of relay
The supplying power for input end of coil；After relay driving module receives control signal, it is connected in the current supply circuit of relay coil
Switch element open, to provide charge tunnel for relay coil, generation galvanomagnetic-effect is to drive relay switch adhesive to enter
Row power supply.When the input terminal voltage of relay switch reduces suddenly, the characteristic that can not be mutated using electric capacity both end voltage, first
Electric capacity both end voltage still can maintain the pick-up voltage of relay, and relay switch continues to keep attracting state.The utility model
By providing independent power supply circuit for relay coil, avoid the input terminal voltage of relay switch from reducing and cause relay line
Enclose electricity shortage and cause relay switch output end voltage power down, so as to improve circuit stability and reliability.
Brief description of the drawings
Fig. 1 is the circuit block diagram of control relay circuit provided by the utility model；
Fig. 2 is the circuit theory diagrams of one embodiment of control relay circuit provided by the utility model；
Fig. 3 is the circuit theory diagrams of second embodiment of control relay circuit provided by the utility model；
Fig. 4 is the circuit theory diagrams of the 3rd embodiment of control relay circuit provided by the utility model；
Fig. 5 is the circuit theory diagrams of one embodiment of power circuit provided by the utility model.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out
Clearly and completely describing, it is clear that described embodiment is only the utility model part of the embodiment, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment obtained, belong to the scope of the utility model protection.
It is the circuit block diagram of control relay circuit provided by the utility model referring to Fig. 1.
The utility model embodiment provides a kind of control relay circuit 1, including relay driving module 2 and relay supply
Electric module 3；
The relay driving module 2 includes switch element and the control being connected in relay coil J current supply circuit
The control signal input Ctr that switch element is turned on and off；
The relay power supply module 3 includes being used for power supply side VCC, the first diode for connecting relay switch S
D1 and the first electric capacity C1；
The positive pole of the first diode D1 is connected with power supply side VCC, the negative pole of the first diode D1 and
One electric capacity C1 first end connection, the second end ground connection of the first electric capacity C1, the negative pole of the first diode C1 are additionally operable to
Connect relay coil J input.
In the specific implementation, power supply VCC is the first electricity by the first diode D1 while being powered for relay switch S
Hold C1 chargings, supplied after the first electric capacity C1 both end voltages reach relay RL pick-up voltage for relay coil J input
Electricity, after relay driving module 3 receives control signal by control signal input Ctr, energization is provided for relay coil J
Passage, relay switch S adhesives are driven to be powered.When relay switch S input terminal voltage VCC is reduced suddenly, profit
The characteristic that can not be mutated with electric capacity both end voltage, it still can maintain relay RL pick-up voltage, and now the first diode
D1 cathode voltage is less than cathode voltage, the first diode D1 cut-offs, therefore the first electric capacity C1 is relay coil J input
Power supply, relay switch S continue to keep attracting state.The utility model is by providing independent power supply electricity for relay coil
Road, avoid the input terminal voltage of relay switch from reducing and cause relay coil electricity shortage and cause relay switch S to export
Terminal voltage power down, improve circuit stability and reliability.
It should be noted that relay switch S input terminal voltage VCC is reduced suddenly but may be not limited to situations below：
When relay switch S input and output end are respectively connected with electric capacity, and the capacity of the electric capacity of relay switch S output ends connection
During the capacity of the electric capacity connected more than relay switch S inputs, the relay switch S output ends in relay switch S adhesives
The electric capacity moment of connection extracts electric charge, therefore relay switch S input terminal voltages are quickly pulled low.Under the above situation, in relay
In the device switch S input terminal voltage rise time, the voltage at the first electric capacity C1 both ends maintains relay RL release electricity always
On pressure, and leave enough surpluses.
It is the circuit theory diagrams of one embodiment of control relay circuit provided by the utility model referring to Fig. 2.Such as
Shown in Fig. 2, the relay driving module 2 also includes the second diode D2 with relay coil J reverse parallel connections, wherein, institute
It is switching tube Q to state switch element；
The control terminal of the switching tube Q is connected with control signal input Ctr, the first end of switching tube Q connection the
Two diode D1 positive pole, the second end ground connection of the switching tube Q.
It should be noted that switching tube Q control terminal turns on after receiving control signal, now the second diode D2 is being just
Extremely low level, charge tunnel is provided for relay coil J, relay coil J, which is powered, produces galvanomagnetic-effect to drive relay
S adhesives are switched, wherein, the second diode D2 is fly-wheel diode, prevents back-emf caused by relay switch S disconnections
Damage component.
It is the circuit theory diagrams of second embodiment of control relay circuit provided by the utility model referring to Fig. 3.Such as
Shown in Fig. 3, the relay driving module 2 also includes first resistor R1；
The first end of the switching tube Q is connected by first resistor R1 with the second diode D2 positive pole.
Further, the relay driving module 2 also includes second resistance R2 and 3rd resistor R3；
The control terminal of the switching tube Q is connected by second resistance R2 with control signal input Ctr；The switching tube Q
Control terminal be also grounded by 3rd resistor R3.
Wherein, the second resistance R2 and 3rd resistor R3 are sent to switching tube Q after carrying out partial pressure to control voltage signal
Control terminal, provide conducting voltage for switching tube Q.
Further, the relay driving module 2 also includes the second electric capacity C2；
The first end of the second electric capacity C2 is connected with switching tube Q control terminal, the second termination of the second electric capacity C2
Ground.Wherein, the second electric capacity C2 plays a part of preventing interference signal.
It is the circuit theory diagrams of the 3rd embodiment of control relay circuit provided by the utility model referring to Fig. 4.Such as
Shown in Fig. 4, the relay driving module 2 also includes the 3rd diode D3 and the 4th resistance R4；
The 3rd diode D3 and the second diode D2 are in parallel in the same direction, and the 4th resistance R4 and first resistor R1 is simultaneously
Connection.
Preferably, the switching tube Q is NPN type triode, the of the current collection extremely switching tube Q of the NPN type triode
One end, transmitting extremely switching tube Q the second end of the NPN type triode, the base stage of the NPN type triode is switching tube Q
Control terminal.
It is the circuit theory diagrams of one embodiment of power circuit provided by the utility model referring to Fig. 5.
The utility model embodiment provides a kind of power circuit 4, including control relay circuit 1 and relay RL；
The control relay circuit 1 is foregoing control relay circuit；
The relay RL includes coil J and switch S；
The switch elements in series of the relay driving module 2 is in relay coil J current supply circuit, the relay
The power supply side VCC of power supply module 3 is connected with relay switch S, the first diode D1's of the relay power supply module 3
Negative pole is connected with relay coil J input.
In the specific implementation, power supply VCC is the first electricity by the first diode D1 while being powered for relay switch S
Hold C1 chargings, supplied after the first electric capacity C1 both end voltages reach relay RL pick-up voltage for relay coil J input
Electricity, after relay driving module 2 receives control signal by control signal input Ctr, energization is provided for relay coil J
Passage, relay switch S adhesives are driven to be powered.When relay switch S input terminal voltage VCC is reduced suddenly, profit
The characteristic that can not be mutated with electric capacity both end voltage, it still can maintain relay RL pick-up voltage, and now the first diode
D1 cathode voltage is less than cathode voltage, the first diode D1 cut-offs, therefore the first electric capacity C1 is relay coil J input
Power supply, relay switch S continue to keep attracting state.The utility model is by providing independent power supply electricity for relay coil
Road, avoid the input terminal voltage of relay switch from reducing and cause relay coil electricity shortage and cause relay output end voltage
Power down, improve circuit stability and reliability.
It should be noted that relay switch S input terminal voltage VCC is reduced suddenly but may be not limited to situations below：
When relay switch S input and output end are respectively connected with electric capacity, and the capacity of the electric capacity of relay switch S output ends connection
During the capacity of the electric capacity connected more than relay switch S inputs, the relay switch S output ends in relay switch S adhesives
The electric capacity moment of connection extracts electric charge, therefore relay switch S input terminal voltages are quickly pulled low.Under the above situation, in relay
In the device switch S input terminal voltage rise time, the voltage at the first electric capacity C1 both ends maintains relay RL release electricity always
On pressure, and leave enough surpluses.
Further, the power circuit 4 also includes the 3rd electric capacity C3 and the 4th electric capacity C4, wherein, the 4th electric capacity
C4 capacity is more than the 3rd electric capacity C3 capacity；
The first end of the 3rd electric capacity C3 is connected with relay switch S input, and the second of the 3rd electric capacity C3
End ground connection, the first end of the 4th electric capacity C4 are connected with relay switch S output end, the second end of the 4th electric capacity C4
Ground connection.
If it should be noted that be respectively connected with electric capacity in relay switch S input and output end, and relay
When the capacity of the electric capacity of the Capacity Ratio relay switch S output ends connection of the electric capacity of switch S input connections is big, when relay is opened
When closing S adhesives, the large bulk capacitance of relay switch S inputs can discharge a large amount of electric charges, and relay switch S output ends is small
Capacity has little time to absorb, and can make to produce very big dash current in circuit, damages device.Therefore the present embodiment is in relay
Switch S output ends and connect the 4th electric capacity C4, the 3rd electric capacity C3 is connected in relay switch S inputs, because the 4th electric capacity C4
Capacity is more than the 3rd electric capacity C3 capacity, and the 4th electric capacity C4 can in time be absorbed to the 3rd electric capacity C3 electric charge, be prevented in electricity
Very big dash current damage device is produced in road.
It should be noted that above-described embodiment provide relay driving module 2 in, switching tube Q be NPN type triode only
A kind of embodiment only therein, in other embodiments, switching tube Q may be replaced by PNP type triode or other
Three ports for control switching device or its derivation device, in different application scenarios, depending on the power consumption of actual circuit, cost, driving work(
Rate and require reasonable selection and setting with the drive control component parameter matching of switching tube etc., selection and to set switching tube be existing
There is the conventional design process of technology, herein without repeating.
Control relay circuit and power circuit provided by the utility model, power supply for relay switch while powering
Charged by the first diode for the first electric capacity, be relay after the first electric capacity both end voltage reaches the pick-up voltage of relay
The supplying power for input end of coil；After relay driving module receives control signal, it is connected in the current supply circuit of relay coil
Switch element open, to provide charge tunnel for relay coil, generation galvanomagnetic-effect is to drive relay switch adhesive to enter
Row power supply.When the input terminal voltage of relay switch reduces suddenly, the characteristic that can not be mutated using electric capacity both end voltage, first
Electric capacity both end voltage still can maintain the pick-up voltage of relay, and relay switch continues to keep attracting state.The utility model
By providing independent power supply circuit for relay coil, avoid the input terminal voltage of relay switch from reducing and cause relay line
Enclose electricity shortage and cause relay switch output end voltage power down, so as to improve circuit stability and reliability.
Described above is preferred embodiment of the present utility model, it is noted that for the ordinary skill of the art
For personnel, on the premise of the utility model principle is not departed from, some improvements and modifications can also be made, these are improved and profit
Decorations are also considered as the scope of protection of the utility model.
Claims (9)
1. a kind of control relay circuit, it is characterised in that including relay driving module and relay power supply module；
The relay driving module includes opening described in the switch element being connected in the current supply circuit of relay coil and control
Close the control signal input that element is turned on and off；
The relay power supply module includes being used for the power supply side, the first diode and the first electricity for connecting relay switch
Hold；
The positive pole of first diode is connected with the power supply side, the negative pole of first diode and the described first electricity
The first end connection of appearance, the second end ground connection of first electric capacity, the negative pole of first diode are additionally operable to connect relay
The input of coil.
2. control relay circuit as claimed in claim 1, it is characterised in that the relay driving module also include with after
Second diode of electric apparatus coil reverse parallel connection, wherein, the switch element is switching tube；
The control terminal of the switching tube is connected with the control signal input, the first end connection described second of the switching tube
The positive pole of diode, the second end ground connection of the switching tube.
3. control relay circuit as claimed in claim 2, it is characterised in that the relay driving module also includes first
Resistance；
The first end of the switching tube is connected by the first resistor with the positive pole of second diode.
4. control relay circuit as claimed in claim 2, it is characterised in that the relay driving module also includes second
Resistance and 3rd resistor；
The control terminal of the switching tube is connected by the second resistance with the control signal input；The control of the switching tube
End processed is also grounded by the 3rd resistor.
5. control relay circuit as claimed in claim 2, it is characterised in that the relay driving module also includes second
Electric capacity；
The first end of second electric capacity is connected with the control terminal of the switching tube, the second end ground connection of second electric capacity.
6. control relay circuit as claimed in claim 3, it is characterised in that the relay driving module also includes the 3rd
Diode and the 4th resistance；
3rd diode and second diode are in parallel in the same direction, and the 4th resistance is in parallel with the first resistor.
7. the control relay circuit as described in any one of claim 2 to 6, it is characterised in that the switching tube is NPN type three
Pole pipe, the first end of the extremely described switching tube of current collection of the NPN type triode, the transmitting extremely institute of the NPN type triode
The second end of switching tube is stated, the base stage of the NPN type triode is the control terminal of the switching tube.
8. a kind of power circuit, it is characterised in that including control relay circuit and relay；
The control relay circuit is the control relay circuit as described in any one of claim 1 to 7；
The relay includes coil and switch；
In the current supply circuit of the relay coil, the relay supplies the switch elements in series of the relay driving module
The power supply side of electric module is connected with the relay switch, the negative pole of the first diode of the relay power supply module with
The input connection of the relay coil.
9. power circuit as claimed in claim 8, it is characterised in that the power circuit also includes the 3rd electric capacity and the 4th electricity
Hold, wherein, the capacity of the 4th electric capacity is more than the capacity of the 3rd electric capacity；
The first end of 3rd electric capacity is connected with the input of the relay switch, the second termination of the 3rd electric capacity
Ground, the first end of the 4th electric capacity are connected with the output end of the relay switch, the second end ground connection of the 4th electric capacity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720393146.6U CN206758359U (en) | 2017-04-14 | 2017-04-14 | Control relay circuit and power circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720393146.6U CN206758359U (en) | 2017-04-14 | 2017-04-14 | Control relay circuit and power circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206758359U true CN206758359U (en) | 2017-12-15 |
Family
ID=60614079
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720393146.6U Active CN206758359U (en) | 2017-04-14 | 2017-04-14 | Control relay circuit and power circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206758359U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108183050A (en) * | 2018-02-27 | 2018-06-19 | 厦门芯阳科技股份有限公司 | A kind of high security switch control relay drive circuit |
| CN110588435A (en) * | 2019-09-20 | 2019-12-20 | 宝能(广州)汽车研究院有限公司 | High-voltage control system of electric automobile and high-voltage power-on control method thereof |
| CN114334543A (en) * | 2021-12-02 | 2022-04-12 | 广东友电新能源科技有限公司 | Relay acceleration driving circuit |
-
2017
- 2017-04-14 CN CN201720393146.6U patent/CN206758359U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108183050A (en) * | 2018-02-27 | 2018-06-19 | 厦门芯阳科技股份有限公司 | A kind of high security switch control relay drive circuit |
| CN108183050B (en) * | 2018-02-27 | 2023-09-05 | 厦门芯阳科技股份有限公司 | High-safety switch control relay driving circuit |
| CN110588435A (en) * | 2019-09-20 | 2019-12-20 | 宝能(广州)汽车研究院有限公司 | High-voltage control system of electric automobile and high-voltage power-on control method thereof |
| CN114334543A (en) * | 2021-12-02 | 2022-04-12 | 广东友电新能源科技有限公司 | Relay acceleration driving circuit |
| CN114334543B (en) * | 2021-12-02 | 2024-03-22 | 深圳科士达科技股份有限公司 | Relay acceleration driving circuit |
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